Radiohead frontman Thom Yorke will release two new songs in September on limited-edition 12". The Hollow Earth and FeelingPulledApartbyHorses are to be released under Yorke's own name, although there are signs that he is considering a new moniker – or even a new backing band – for his solo project.

"Dear Sir or Madam," Yorke wrote yesterday on the official Radiohead blog. "This is to inform you of the release of two more bits of work shortly ... Both were produced by Nigel Godrich as ever. And mastered by Bob Ludwig. They are being put out on 12" with sliced sleeve by Stanley [Donwood] and [myself]."

Radiohead and Yorke have been busy these last few weeks. Largely dormant since 2007's In Rainbows, the band released a tribute to first world war veteran Harry Patch at the beginning of August. These Are My Twisted Words, another new track, was posted to their website just weeks later. Yorke has also recorded a cover of All for the Best, originally by US band Miracle Legion, which will appear on a Miracle Legion tribute album and limited-edition 7" later this month.

Both FeelingPulledApartbyHorses and The Hollow Earth have been ripening in Radiohead vaults for some time. The former, Yorke wrote, is a "radical rework of an old tune" from 2001, written and performed with Radiohead guitarist Jonny Greenwood. The "bass menace" of The Hollow Earth was, meanwhile, destined for Yorke's 2006 solo album, The Eraser, "but needed a little more time".

The forthcoming 12" will be released in shops and at Radiohead's online store on 21 September. According to a source at Canadian distributor Sonic Unyon, there many be as few as 4,000 copies available in Europe (North America will receive another 4,000). Digital versions of the tracks will go on sale on 6 October.

Billboard reports that Yorke is considering touring this material later in the year. Rather than play solo, he may even perform with a band – and it won't necessarily be Radiohead. "These days it's all getting kind of blurry," Yorke wrote. The singer is also reportedly considering new names for his solo project.

"Thomosexual," suggested Adam Buxton in an interview with Yorke, "[or] the Duke of Yorke." Yorke preferred T.Homme. "[It's] kind of sophisticated," he said.